feat: add absence notification and analytics features

- Implemented AbsenceNotifyView for notifying absence with session details.
- Created AnalyticsView for displaying group analytics and managing students at risk.
- Added ClassAttendanceView for marking attendance in classes.
- Defined new schemas for analytics and attendance in shared package.

apps/backend/src/modules/groups/routes.ts

@@ -1,4 +1,5 @@
 import { Hono } from 'hono';
+import analyticsRoutes from '../analytics/routes';
 import addToGroupWaitlistRoute from '../attendees/features/add-to-waitlist/route';
 import bulkCreateAttendeesRoute from '../attendees/features/bulk-create/route';
 import createAttendeeRoute from '../attendees/features/create/route';
@@ -21,6 +22,7 @@ routes.route('/', bulkCreateAttendeesRoute);
 routes.route('/', getByIdRoute);
 routes.route('/', addToGroupWaitlistRoute);
 routes.route('/', groupWaitlistRoutes);
+routes.route('/', analyticsRoutes);
 routes.route('/', removeAttendeeRoute);
 
 export default routes;